Submission #774143

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
774143	2023-07-05 12:20:31	SanguineChameleon	Keys (IOI21_keys)	C++17	9 / 100	810 ms	175052 KiB

keys

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#include <bits/stdc++.h>
using namespace std;
const int maxN = 3e5 + 20;
deque<int> Q;
struct comp {
  set<int> rooms;
  map<int, set<pair<int, int>>> edges;
  set<int> cands, keys;
  int edge_cnt = 0;
  int id = -1;
  int par = -1;
  void add_cand(int k) {
    if (par == -1 && cands.empty()) {
      Q.push_back(id);
    }
    cands.insert(k);
  }
  void add_key(int k) {
    keys.insert(k);
    if (edges.find(k) != edges.end()) {
      add_cand(k);
    }
  }
  void add_edge(int u, int v, int k) {
    if (u > v) {
 
 
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